Stainless Steel 304H Sheet & Plate Manufacturer in India

Author : Sachiya International | Published On : 14 Oct 2026

Stainless Steel 304H Sheet & Plate Manufacturer in India – Sachiya Steel International Private Limited

Stainless Steel 304H Sheet & Plate Manufacturer in India, Sachiya Steel International Private Limited supplies high-quality stainless steel sheets and plates for industrial applications requiring strength, durability, corrosion resistance, and high-temperature performance. We serve customers across India and international markets with stainless steel products manufactured and supplied according to industry requirements. Our SS 304H sheets and plates are suitable for power plants, petrochemical industries, heat exchangers, boilers, pressure vessels, and heavy engineering projects.

What Is Stainless Steel 304H Sheet & Plate?

Stainless Steel 304H is a high-carbon austenitic stainless steel grade developed for applications that require improved strength at elevated temperatures. It contains chromium, nickel, and a higher carbon content than low-carbon stainless steel grades, helping it maintain its mechanical strength in high-temperature service.

SS 304H sheets are commonly used for lighter-gauge applications, while plates are preferred for heavy-duty equipment and structural components. Both forms offer good oxidation resistance, fabrication characteristics, and durability when selected for suitable operating conditions.

Applications of SS 304H Sheets and Plates

SS 304H sheets and plates are widely used in industries that require dependable performance under heat and mechanical stress.

• Power generation: Used in selected boiler components, thermal equipment, and high-temperature industrial systems.

• Heat exchangers: Suitable for components exposed to elevated temperatures and demanding operating conditions.

• Petrochemical industries: Used in process equipment, industrial vessels, and fabricated components.

• Chemical processing: Suitable for equipment handling compatible chemicals under specified operating conditions.

• Pressure vessels: Used in engineered vessels and process equipment when the applicable design code permits the material.

• Furnaces and thermal systems: Offers oxidation resistance for selected high-temperature applications.

• Food and pharmaceutical industries: Can be used for suitable equipment where corrosion resistance, cleanliness, and fabrication requirements are satisfied.

Material selection should always consider operating temperature, pressure, chemical concentration, and applicable engineering standards.

Corrosion Resistance of SS 304H

Stainless Steel 304H provides good corrosion resistance in many atmospheric and moderately corrosive environments. Its chromium content forms a protective passive layer, while nickel supports its austenitic structure and toughness.

However, SS 304H is not suitable for every corrosive environment. Chloride-rich conditions can cause pitting and crevice corrosion, while certain acids may attack the material depending on concentration and temperature. For marine, highly acidic, or chloride-intensive applications, SS 316L, duplex stainless steel, or other specialised alloys may be more appropriate.

Chemical Composition of SS 304H

The typical chemical composition requirements for ASTM 304H stainless steel include the following approximate limits. The final composition should be verified against the applicable product specification and material test certificate.

• Carbon: 0.04–0.10%

• Chromium: 18.0–20.0%

• Nickel: 8.0–11.0%

• Manganese: Maximum 2.0%

• Silicon: Maximum 0.75%

• Phosphorus: Maximum 0.045%

• Sulfur: Maximum 0.030%

Iron forms the balance of the alloy. The higher carbon content helps improve high-temperature strength compared with standard low-carbon grades.

Mechanical Properties of SS 304H Plate

The mechanical properties of SS 304H make it suitable for applications involving elevated temperatures and mechanical loading. Typical minimum values commonly associated with ASTM A240 plate include:

• Tensile strength: 515 MPa

• Yield strength: 205 MPa

• Elongation: 40% for specified test conditions

• Hardness: Generally limited to 201 HBW under the applicable specification

Actual results depend on product form, thickness, heat treatment, and the governing standard. High-temperature design calculations should use appropriate code-approved material properties rather than room-temperature values alone.

SS 304H Equivalent Grades

When sourcing Stainless Steel 304H sheets and plates, buyers may encounter the following grade designations:

• AISI: 304H

• UNS: S30409

• EN: 1.4948

• JIS: SUS 304H, subject to the applicable standard

Equivalent designations do not always guarantee identical chemical, mechanical, or dimensional requirements. Buyers should verify the material specification before approving a substitute grade.

Difference Between SS 304, SS 304H, and SS 304L

SS 304, SS 304H, and SS 304L are austenitic stainless steel grades, but their carbon requirements and intended applications differ.

SS 304 is a general-purpose stainless steel used for equipment, fabrication, and structural applications. SS 304H has a higher minimum carbon requirement, making it suitable for applications where elevated-temperature strength is important. SS 304L has a maximum carbon content of 0.030%, helping reduce the risk of sensitisation during welding and making it suitable for many welded components.

The best grade depends on the operating temperature, welding requirements, corrosion conditions, and applicable design code.

SS 304H Heat Resistance

SS 304H offers good oxidation resistance at elevated temperatures and is commonly considered for certain furnace, boiler, and thermal processing applications. Its suitability depends on the atmosphere, exposure duration, thermal cycling, and mechanical loading.

Although temperatures around 870°C in intermittent service and 925°C in continuous service are often cited for oxidation resistance, these figures should not be treated as universal allowable operating temperatures. Pressure, stress, and design-code limitations may impose lower limits.

SS 304H Sheet and Plate Standards

Stainless Steel 304H sheets and plates are commonly specified to ASTM A240 / ASME SA-240, covering chromium and chromium-nickel stainless steel plate, sheet, and strip for pressure vessels and general applications.

Other standards may apply to related product forms, but ASTM A312 is primarily associated with stainless steel pipes, while ASTM A554 covers certain mechanical tubing. These standards should not be presented as interchangeable plate specifications.

At Sachiya Steel International Private Limited, customers can discuss the required grade, dimensions, finish, testing, and documentation before ordering.

Manufacturing Process of SS 304H Plates

The manufacturing process depends on the required thickness, surface finish, and product specification.

1. Hot rolling: Stainless steel is rolled to achieve the required plate dimensions.

2. Heat treatment: Appropriate solution annealing helps establish the required metallurgical condition.

3. Pickling: Surface scale is removed using a controlled cleaning process.

4. Cold rolling: Used where applicable to achieve specific thicknesses and finishes.

5. Cutting and finishing: Plates are cut to the requested dimensions and inspected.

6. Quality inspection: Dimensions, surface condition, grade identification, and documentation are checked according to purchase requirements.

Material test certificates and additional inspection documentation can be discussed when placing an order.

SS 304H Plate Specifications and Available Sizes

SS 304H sheets and plates can be sourced in different thicknesses, widths, lengths, and surface finishes depending on availability and project requirements.

• Thickness: Thin sheets through heavy plates, subject to availability.

• Width: Standard and customised dimensions.

• Length: Cut-to-size options, depending on stock and processing facilities.

• Finish: Available finishes depend on thickness, production route, and specification.

• Documentation: Material test certificates and inspection requirements can be specified with the order.

Customers should confirm exact dimensions, tolerances, finish, and applicable standards before finalising procurement.

SS 304H Plate Weight Calculation

The approximate weight of a stainless steel plate can be calculated using its length, width, thickness, and material density.

Formula:

Plate weight (kg) = Length (m) × Width (m) × Thickness (mm) × Density (kg/m³) ÷ 1,000

For SS 304H, an approximate density of 7,930 kg/m³ can be used for estimation.

For example, a plate measuring 2,000 mm × 1,000 mm × 10 mm has a volume of 0.02 m³.

Estimated weight = 0.02 × 7,930 = 158.6 kg.

The actual weight may vary slightly due to dimensional tolerances and the material supplied.

SS 304H Sheet and Plate Price in India

The price of SS 304H sheets and plates varies according to thickness, dimensions, quantity, surface finish, manufacturing specification, testing requirements, and prevailing stainless steel market conditions.

Custom cutting, special inspection, certification, and delivery arrangements can also affect the final price. For an accurate quotation, buyers should provide the required grade, thickness, width, length, quantity, delivery location, and applicable standard.

Sachiya Steel International Private Limited assists customers with product enquiries and quotations based on their project requirements.

Why Choose Sachiya Steel International Private Limited?

Sachiya Steel International Private Limited focuses on supplying stainless steel products for industrial and engineering applications. Customers can discuss their requirements for SS 304H sheets and plates, including material specifications, dimensions, documentation, and export orders.

Our team supports buyers seeking stainless steel solutions for power generation, petrochemical processing, heat exchangers, pressure equipment, and general industrial fabrication. We aim to provide responsive communication, suitable material options, and dependable service for domestic and international customers.

Frequently Asked Questions

1. What is SS 304H stainless steel?

SS 304H is a high-carbon austenitic stainless steel grade designed for applications requiring improved strength at elevated temperatures.

2. What is the standard for SS 304H plates?

ASTM A240 and ASME SA-240 are commonly used specifications for SS 304H stainless steel plate, sheet, and strip.

3. What is the equivalent grade of SS 304H?

UNS S30409 and EN 1.4948 are commonly referenced designations for this grade. Always verify the applicable standard.

4. Is SS 304H suitable for high-temperature applications?

Yes, it is used in selected high-temperature applications, subject to operating conditions and engineering design requirements.

5. What is the difference between SS 304H and SS 304L?

SS 304H has a higher carbon content for elevated-temperature strength, whereas SS 304L has lower carbon content to improve resistance to sensitisation during welding.

6. Is SS 304H corrosion-resistant?

Yes, it provides good corrosion resistance in many environments, but its suitability depends on the chemical composition, temperature, and concentration of the exposure.

7. How is SS 304H plate weight calculated?

Weight is estimated by multiplying plate volume by material density. An approximate density of 7,930 kg/m³ is commonly used for calculations.

8. What affects SS 304H plate prices in India?

Thickness, dimensions, quantity, finish, certification, processing, and prevailing raw material prices affect the final quotation.

9. Can SS 304H plates be customised?

Custom dimensions and cutting may be available depending on stock, processing capability, and order requirements.

10. Where can I buy SS 304H sheets and plates in India?

Contact Sachiya Steel International Private Limited to discuss SS 304H sheet and plate requirements, specifications, availability, and pricing.

Conclusion

Sachiya Steel International Private Limited supplies stainless steel solutions for industrial buyers seeking reliable material for demanding applications. Stainless Steel 304H sheets and plates offer a useful combination of elevated-temperature strength, oxidation resistance, and fabrication properties when selected for the correct service conditions. Contact our team to discuss specifications, dimensions, documentation, and competitive quotations for your project.

VISIT OUR WEBSITE -  https://steeltube.co.in/stainless-steel-304h-sheet-plate-manufacturer-in-india/

Contact Sachiya Steel International Private Limited

• Phone: +91 9769056007

• Email: [email protected]

• Website: www.sachiyasteel.com